Signifiers

Many Tags contain a character that I have called a "Signifier" which is added as a decoration to the Tag. These include Halos, Asterisks, Arrows, TriDots and Quotation marks to name those that I have recognised so far. What I don't know is what they signify - a group of taggers sharing the same character as a sign of membership in a crew - or are they purely decorative? Comments?